Large out-of-plane spin polarization in a spin-splitting one-dimensional metallic surface state on Si(557)-Au
/ Authors
T. Okuda, K. Miyamoto, Y. Takeichi, H. Miyahara, M. Ogawa, A. Harasawa, A. Kimura, I. Matsuda, A. Kakizaki, T. Shishidou
and 1 more author
/ Abstract
We report evidence of a spin-split one-dimensional metallic surface state for the system of Si(557)-Au obtained by means of spin- and angle-resolved photoelectron spectroscopy. Strikingly, considerably large out-of-plane spin polarization which is locked to one specific direction has been observed which is in good agreement with the one-dimensional Rashba spin-splitting surface states caused by the highly anisotropic wave function of the gold chains predicted by first-principles calculation.
Journal: Physical Review B